High Index Plastic

Polycarbonate lenses likewise have built-in ultraviolet protective properties. Like the way that sun block prevents the sun’s rays from damaging the body, UV protection shields the eyes from exactly the same detrimental light rays. Other styles of plastic lenses must be specially treated to block exactly the same level of UV, but polycarbonate lenses automatically offer this protection. High-index lenses are eyeglass lenses that are designed to be thinner and lighter than regular lenses. They are generally recommended for those who have significantly high refractive errors and strong prescriptions for nearsightedness, farsightedness, or astigmatism. [newline]The 1.74 high-index lens material is the thinnest lens available.
Polycarbonate lenses are also often lighterweight and thinner than plastic lenses. Choose a lens material with a refractive index greater than 1.60. The higher the index of refraction, the thinner your lenses will undoubtedly be. Lenses with a refractive index of just one 1.67 and higher could be less than half the thickness of regular plastic lenses.

• Understanding the various numbers and how they relate to your eyesight is crucial when buying new glasses.
• The high index polycarbonate lenses debate gets lots of traction as whatever you choose between them, it will replace metal and be 20% less thick.
• The lenses because of this vision issue are often thicker at the lens’ edge, but thin in the center.

Lens materials which have a refractive index greater than standard CR39 plastic (1.50) and regular glass (1.52) are believed high-index lenses. That is all I needed to state about High index vs polycarbonate lenses. Lenses are mere objects but an integral part of those who have to wear them constantly. The 1.74 high index lenses are typically as thin as possible and the best option for the best prescriptions, including +9.25 and above or -9.25and below. This option is effective with full-rim plastic, acetate, and metal frames. While you are searching for your next couple of glasses, you might start to see the term “lens index.” But just what does it mean, and what are the several types of lenses?
Regular lenses that contain a strong optical prescription usually need a thicker and heavier lens to be able to bend light better and correct the high refractive error. They are convenient if you don’t want to carry a pair of clear eyeglasses and another pair of sunglasses. Although they block 100% of Ultra violet rays and reduce glare, some individuals find that photochromic lenses do not turn dark enough while inside the car or on an overcast day.

Best Places To Get Glasses

With so many lens materials and lens treatment combinations available, knowing when to recommend one high-index lens versus another can look like a numbers game. To win that numbers game, you’ve surely got to master a few key optical concepts and facts. Yes, high index lenses are more expensive than polycarbonate lenses because they are created from expensive materials, and the manufacturing process is difficult and harder to grind. But it’s a high-quality lens material making the excess cost worthwhile for the customer. Whatever option you choose, Lenses are for vision correction, and frames are for comfort and attractiveness.

Polycarbonate lenses also have built-in ultraviolet protection. Verywell Health articles are reviewed by board-certified physicians and healthcare professionals. These medical reviewers confirm the content is thorough and accurate, reflecting the most recent evidence-based research. Content is reviewed before publication and upon substantial updates. Oliver is an ABO Certified Optician and contains been working in the attention care industry for over 15 years. His books, videos and articles touch on various subjects, such as for example eye care, good tech habits, motivation and leadership.

High Grade Lens

Polycarbonate lenses are less likely to fracture than plastic lenses or hi-index, so that they certainly are a great option kids’ glasses. Essilor’s polycarbonate lenses are 20% thinner, 30% lighter, and 12x more impact resistant than standard plastic lenses. Anti-reflective treatments—such as Crizal Sapphire® 360°—can be put into Essilor’s polycarbonate lenses. Polycarbonate lenses are safer than traditional lens materials since they aren’t brittle.

That’s why a lens made from a 1.67-index material can be significantly thinner than a standard-index (1.50) plastic-type material with the same prescription. The 1.50 standard index plastic lenses were the first alternative to glass lenses. While it is a worthwhile alternative for a few glasses wearers, these lenses need to be coated since they don’t block UV radiation well, plus they scratch relatively easily. This describes the change in lens curvature from the biggest market of the lens to the edge.

Exactly what are high index lenses, and which are the differences between polycarbonate vs. high index lenses? Higher prescriptions require high index lenses to help keep them thin and light. High index lenses are usually very stylish and lightweight and are meant for glasses wearers with high prescriptions. Keep up with the most recent trends popular and design so your patients can as well. Eynoa 1.67, our premium high-index lens material, is thin and lightweight yet optically pure.